Gulf Keystone Petroleum Ltd — Proxy Solicitation & Information Statement 2026

May 19, 2026

G K P

GULF KEYSTONE PETROLEUM

Computershare

All Correspondence to:
The office of the Depositary
Computershare Investor Services PLC
The Pavilions, Bridgwater Road,
Bristol, BS99 6ZY

MR A SAMPLE
< DESIGNATION>
SAMPLE STREET
SAMPLE TOWN
SAMPLE CITY
SAMPLE COUNTY
AA11 1AA

100000

Holder Reference Number
C0000000000

Form of Instruction - Annual General Meeting to be held on 20 June 2025

To View the Annual Report online visit:
www.gulfkeystone.com

Register at www.investorcentre.co.uk - elect for electronic communications & manage your shareholding online!

To be effective, all forms of instruction must be lodged at the office of the Depositary at:
Computershare Investor Services PLC, The Pavilions, Bridgwater Rd, Bristol BS99 6ZY by 17 June 2025 at 10.00 am (CET).

Explanatory Notes:

1. Please indicate, by placing "X" in the appropriate space overleaf, how you wish your votes to be cast in respect of each of the Resolutions. If this form is duly signed and returned, but without specific direction as to how you wish your votes to be cast, the form will be rejected.
2. The 'Vote Withheld' option overleaf is provided to enable you to abstain on any particular Resolution. However, it should be noted that a 'Vote Withheld' is not a vote in law and will not be counted in the calculation of the proportion of the votes 'For' and 'Against' a Resolution.
3. To give an instruction via the CREST system, CREST messages must be received by the issuer's agent (ID number 3RA50) not later than 10.00 am (CET) on 17 June 2025.
4. Any alterations made in this form should be initialled.
5. The completion and return of this form will not preclude a member from attending the meeting online. Should the holder, or a representative of that holder wish to attend the meeting and/or vote at the meeting, they must notify the Depositary in writing or email UKALLDITeam2@computershare.co.uk
6. Entitlement to attend and vote at the meeting and the number of votes which may be cast thereat will be determined by reference to the Depositary Interest Register at close of business on the day which is three days before the day of the meeting. Changes to entries on the Depositary Interest Register after that time shall be disregarded in determining the rights of any person to attend and vote at the meeting.

Kindly Note: This form is issued only to the addressee(s) and is specific to the unique designated account printed hereon. This personalised form is not transferable between different (i) account holders; or (ii) uniquely designated accounts. Computershare Investor Services PLC (the "Depositary") and the Custodian accept no liability for any instruction that does not comply with these conditions.

All Named Holders

MR A SAMPLE
< Designation>
Additional Holder 1
Additional Holder 2
Additional Holder 3
Additional Holder 4

193497_243489_MAIL/000001/000001/SG601/11

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Form of Instruction

Please use a black pen. Mark with an X inside the box as shown in this example.

X

C0000000000

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I/We hereby instruct the Custodian "Computershare Company Nominees Limited" to vote on my/our behalf at the Annual General Meeting of the Company to be held via webcast, on 20 June 2025 at 10.00 am (CET), and at any adjournment thereof.

Ordinary Resolutions

1. THAT BDO LLP be re-appointed as the Company's auditor to hold office from the close of this meeting until the close of the Company's next Annual General Meeting and that the Board of Directors be authorised to determine the auditor's remuneration.
2. THAT Mr David Thomas be and is hereby re-appointed as a Director in accordance with the Bye-laws.
3. THAT Ms Wanda Mwaura be and is hereby re-appointed as a Director in accordance with the Bye-laws.
4. THAT Mr Julien Balkany be and is hereby re-appointed as a Director in accordance with the Bye-laws.
5. THAT Ms Marianne Daryabegui be and is hereby appointed as a Director in accordance with the Bye-laws.
6. THAT Ms Catherine Krajicek be and is hereby appointed as a Director in accordance with the Bye-laws.
7. THAT Mr Jon Harris be and is hereby re-appointed as a Director in accordance with the Bye-laws.
8. THAT Mr Gabriel Papineau-Legris be and is hereby re-appointed as a Director in accordance with the Bye-laws.
9. THAT the Directors' Remuneration Report as set out in the Annual Report for the year ended 31 December 2024 be and is hereby approved.
10. THAT the Directors' Remuneration Policy as set out in the Annual Report for the year ended 31 December 2024 be and is hereby approved and adopted.
11. THAT the Company be generally and unconditionally authorised to make market purchases of its Common Shares.

For	Against	Vote Withheld
☐	☐	☐
☐	☐	☐
☐	☐	☐
☐	☐	☐
☐	☐	☐
☐	☐	☐
☐	☐	☐

Signature

Date

DD/MM/YY

In the case of joint holders, only one holder need sign. In the case of a corporation, the Form of Instruction should be signed by a duly authorised official whose capacity should be stated, or by an attorney.

H925

35

GKP

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